Whipstock



" July 5 1927.

F. KINZBACH WHIPSTOCK Filed June 10. 1926 Patented July 5, 1927.

1,634,582 PATENT OFFICE.

' FRANK KINZBACH, OF HOUSTON, TEXAS.

WHIPSTOCK.

Application filed June 10, 1926. Serial No..115,0 16.

This invention relates to new and useful improvements in a whip stock.

One object of the invention is to provide a whip stock of the character described equipped with a locking device whereby the whip stock may be secured in fixed position in a casing, or pipe, to be perforated.

In drilling wells it often happens that the lower end of the bore becomes obstructed, by the dropping of a bit, or other object therein so that the drilling cannot proceed in the original bore, and in suchcase the casing in the well bore must be perforated on one side, above said obstruction, and the bottom of the original hole side tracked by the continuing of the drilling operations through said lateral perforation in the casing. In order to perforate the casing a ,whip stock is lowered into the bore, the upper end of the whi stock being wedge shaped so as to form a eflecting guide and a drilling tool is then let down into the casing between the inclined face of the 'whip stock and the opposing side of the casing and is rotated until the casing is cut through and the original bore side tracked at its lower end; Unless the whip stock is anchored in the casing the rotatlon of the drilling tool often causes the whip stock to turn, or rotate about a vertical axis thus interfering with the work of erforating the casing and making it diffic t or' impossible to perforate the same. It is an object of this invention toprovide a means for secprely locking the whip stock against rotation in the casing during the milling o eration.

With t e above and other objects in view this invention has particular relation to cer-v tain novel features of construction, operation and arrangement of parts an example of which is given in this specification and illustrated in the'accompianying drawings,"

wherein 7 v Figure 1 shows a vertical sectional view of the well casing showing a fragmentary sectionalview of the whip stock and also showing a drilling tool associated therewith. Figure 2 shows a fragmentary side view,

. partly in section of the whip stock, as located in the casing.

Figure 3,shows a fragmentary elevational view of the whip stock in the casing, and

Figure 4 shows a horizontal sectional view taken on the line 4-4 of Figure 3.

. Referring now more particularly to the drawings, wherein like numerals of reference designate similar parts in each of the figures, the numeral 1 designates a well casing to be perforated, and the numeral 2 designates a linerlocated in and extending beneath the lower end of the casing. The numeral 3 designates a whip stock proper whose lower end is substantially cylindrical and which tapers to a point at the upper end thus forming an inclined face 4 against which the milling tool 5 works. The lower end of the whip stock hasa slot 6 therein in which the hinge member 7 is pivoted and this hinge member has a depending outwardly threaded neck 8 on which the upper end of the tubular sleeve 9 is threaded. p A downwardly tapering anchor 10 is adapted to seat in the upper end of the liner 2 and this anchor has an upwardly extending shank 11, which-telescopes up into the sleeve 9. In the sleeve 9 the shank 11 has a trans;

verse notch 12 formed with a downwardly and outwardly sloping bearing face 13 and provided with an external shoulder 14 at its upper end. 'There is a jaw 15 which fits through ,the slot 16 in the sleeve 9, whose ..inner end is beveled to conform to the slope it is lowered into the casing and the anchor 10 seated in the upper end of the liner 2, and thereupon the sleeve 9 moves on down relative to the shank 11 carrying the jaw 15 downwardly with it and the sloping face 13 will force said jaw outwardly against the casing and this will anchor the whi stockagainst. rotation in the casing 1 durlng th drilling operation. 1

- What I claim is:-- I

1. A whip stock comprising an elongated body having a taper extending throughout a major portion thereof to provide a wedging face, ahinged member pivoted to the lower end of said body, a tubular sleeve de-.

pending from said hinge member, an anchor having a'shank which telescopes into said sleeve member, said shank having a .down-' wardlyand outwardly sloping bearing face :with a shoulder at the upper end of said face,- said sleeve having a slot and a jaw working through said slot and whose inner end bears against said face.

2. A whip-stock comprising an elongated body having a taper extending throughout the major portion thereof to provide a wedging face, a hinged member pivoted to the lower end of said body, a tubular sleeve depending from said hinge member, an anchor having a shank which telescopes into said sleeve member, said shank having a downwardly and outwardly sloping face with a shoulder at the upper end of said face, said sleeve having a slot and a jaw working through said slot whose inner end bears against said face and whose outer end is formed with a sharp edge.

A whip stock comprising an elongated body having a taper which extends throughout a major portion thereof to provide a wedging face, a member hingedly connected to the lower end of said body, an anchor, telescoping parts connected to said hinge member and said anchor respectively, one

of said telescoping members having an outwardly sloping face and the other telescoping member having a slotopposite said face and a jaw workingthrough said slot whose inner end bears against the face.

4. A whip stock comprising an elongated body having a taper which extends throughout a major portion thereof to provide a wedging face, an anchor, relatively slidable parts, one hingedly connected to said body and the other connected to said anchor, one of said slidable parts having a sloping hearing face, andthe other of said parts having a bearing, and a jaw working through said bearing, whose inner end bears against said sloping face.

In testimony whereof I have signed my name to this specification.

FRANK KINZBACH. 

